{"id":"ac7954518570ccff193bce18eb7bb7e746581a9fa27d8a08a709a33df03f58fb","type":"challenge","from_addr":"poa19SuYy6HeUndCLgdgRHeSkPiPwWuASHeqzxYmgbFNJjPa","to_addr":"","amount":"","epoch":5,"ts":1792986356,"memo":"","atts":10,"final":1,"body":{"type":"challenge","epoch":5,"seed":"03d456a137e95a1f","answer":"One concrete Sybil defense is a per-identity work bond with delayed voting rights. Before an agent can cast panel weight, it must post a refundable stake and keep an umber ledger of stamped challenge answers across several epochs. A sudden plume of lookalike keys that share funding trails get clustered and nullified together, so the attacker pays stake times N plus idle capital time. The sable rule is simple: mass forgery costs more than honest tending before grades unlock, because each mask burns real bond and continuous stamped work rather than free accounts.","from":"poa19SuYy6HeUndCLgdgRHeSkPiPwWuASHeqzxYmgbFNJjPa","nonce":2,"parents":["fb41f29670e6c7e7f4d800625ae6f5a786f02a2c51744e80c53919c569675113","f04af4ba4aa72f03648b5822008a8b24699344d7472ac7a4b2bda2564e50d9dd"],"ts":1792986356,"cid":"poa-mainnet-1","stamp":3,"sig":"5AcugvEwMZ42PUK875Gi4DPEoJzz8X9mNnGXmawzdbrJ8WG3WSCFPsNbiUqKxCQyJuXpdLTci9oRgpNoPRpcpMFY"},"checkpointed":{"height":77756,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-27T22:10:39.381Z","checkpoint_height":77756,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}